Improvement in combined square and califer



J. POTTS.

y Try-Square Gage.

No. 98,|06. Patented Dec. 2l, 1869.

NAPETERS, PMOTO-UTHDGRAPHER. wASmNGTvN. n (1.",

attent. (titille.

JosIAH Porre, or lui-LimenaE,` Wisconsin.

Letters Patent No. 98,106,1Zate1l December 2l, 1869.

IMPROVEMENT IN COMBINED SQARE .AND CALIPER,

` The Schedule referred to in these Letters Patent and making part of the same To all whom 'it may concern:

Be it known that I, J OSIAH POTTS, of Milwaukee, in the county of Milwaukee, and State of Wisconsin, have invented a new and useful Improvement in Square, Gauge, and Level; and I do hereby declare that lthe ibllowing is a full, clear, 'and exact description thereof', which will enable others skilled iu/ the art to make and use the same, reference being had to the accompanying drawing, forming part 0f this specification.

rlhis invention relates to a new and useful improvement in tool ihrinechanics use, and consists'in combining, with a try-square, a spirit-level and a surfacegauge, whereby mechanical operations lare greatly facilitated.

In the accompanying drawing- Figure 1 represents a side view of the combined tool, with the gauge, and the gauge-slide in place as when in use.

-'l*igure 2 is a cross-section of fig. 1, through the line Similar letters of rference indicate corresponding parts.

A is a try square, formed in the ordinaryinanner,

` except that the stock B forms a spirit-level, as seen at C.'

It will be seen that the spirit-tube is visible from the sides, as it also is from the face of the stock, so that the stock may be levelled and the tongue D of. the. square placed in a perpendicular position7 by viewing the spirit from the sides.

E is the surface-gauge, which is attached to the tongue of the sqeare by means of the slide F ,and the thumb-screw G, by which it is adj ust-ed and fastened in any position on the tongue.

The gauge is adjustable in the slide, when thus at` tached, as either end may be depressed or raised for marking a certain distance above alevel surface, when the square is placed on such a surface as seen in the drawing.

By the curved end of the gauge H, a line mayV he drawn, or a mark made ou a horizontal surface above that ou which the square is placed.

In designating the position of holes to be bored or drilled, and marking distances on vertical or other surfaces froi-n a level,7 this tool will be found of the greatest service.

When the gauge is not required, it may be slipped from the tongue of the square by loosening the thumbscrew.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. In combination with a try-square, the surface'- gauge E, connected with the square by mea-us of the slide F and thumb-screw G, and arranged and operating substantially as described.

2. The combination of the gauge E and the spiritlevel, (as seen at 0,) with a try-square, substantially 

